I've touched on this issue a while back but thought about something I was told by the owner of the brew shop is was frequenting. I have some issues with using maple syrup. I have an abundance of the stuff here because I boil every spring. I was told to add it after the boil but when the wort is still hot just to make sure any bad critters get killed. He said don't boil it. I've seen some recipes and they all say to add to the boil. Does anyone out there have any experience with this and is there any advice I should heed.
Thanks
Da yooper

I was putting maple syrup in my Extract brews 15 minutes to go in the boil. No problems w/taste, etc. What I did find was that it would give me a headache - switched out the syrup for brown sugar and the problem was gone. This, by the way, was done by consuming similar quantities.

I have yet to use maple syrup in a recipe. From what I have read and heard, adding maple syrup to the boil tends to add a woodsy flavor rather than a maple flavor to the beer. A good friend of mine (an accomplished home brewer) primed a porter at bottling with maple syrup and it was outstanding. I looked up the description for maple syrup in the recipe generator and it confirms the above. It says when added to the boil maple syrup may lend a woodsy flavor, when used for priming lends a sweet character. Whatever you do, pasturizing the syrup should be sufficient. Hope this helps.